He said investigators recovered several knives but added that there “could be multiple causes of death.”

Department officials identified the mother as Carol Coronado and said that she was being taken to Carson Station, where she would be booked on suspicion of murder.

The father and the grandmother were at the home when deputies arrived, Coleman said. The grandmother called 911.

The father was being questioned late Tuesday at the Carson Station.

As detectives gathered evidence, Monica Morales stood near yellow tape crime tape and watched the scene unfold. She has lived in the neighborhood all her life and attended an elementary school across the street.